Local recurrence after surgical resection is a complex phenomenon. An important predictive factor is the response to chemotherapy. Central site of disease may be a second independent predictive factor (Lin et al. 2007). Patients with more than 10% viable tumour cells at surgery following neo-adjuvant chemotherapy had a less favourable outcome with an Event-free Survival [EFS] of 47% after 10 years. Patients with good histological response (< 10% viable tumour cells) after chemotherapy alone had a prognosis of about 70% after 10 years.